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      1 ; REQUIRES: asserts
      2 ; RUN: llc < %s -march=x86-64 | FileCheck %s --check-prefix=ASM
      3 ; RUN: llc -debug -o /dev/null < %s -march=x86-64 2>&1 | FileCheck %s --check-prefix=DBG
      4 ; rdar://8168938
      5 
      6 ; This testcase involves SCEV normalization with the exit value from
      7 ; one loop involved with the increment value for an addrec on another
      8 ; loop. The expression should be properly normalized and simplified,
      9 ; and require only a single division.
     10 
     11 ; DBG-NOT: DISCARDING (NORMALIZATION ISN'T INVERTIBLE)
     12 ; ASM: div
     13 ; ASM-NOT: div
     14 
     15 %0 = type { %0*, %0* }
     16 
     17 @0 = private constant [13 x i8] c"Result: %lu\0A\00" ; <[13 x i8]*> [#uses=1]
     18 @1 = internal constant [5 x i8] c"Huh?\00"        ; <[5 x i8]*> [#uses=1]
     19 
     20 define i32 @main(i32 %arg, i8** nocapture %arg1) nounwind {
     21 bb:
     22   %tmp = alloca %0, align 8                       ; <%0*> [#uses=11]
     23   %tmp2 = bitcast %0* %tmp to i8*                 ; <i8*> [#uses=1]
     24   call void @llvm.memset.p0i8.i64(i8* %tmp2, i8 0, i64 16, i32 8, i1 false) nounwind
     25   %tmp3 = getelementptr inbounds %0, %0* %tmp, i64 0, i32 0 ; <%0**> [#uses=3]
     26   store %0* %tmp, %0** %tmp3
     27   %tmp4 = getelementptr inbounds %0, %0* %tmp, i64 0, i32 1 ; <%0**> [#uses=1]
     28   store %0* %tmp, %0** %tmp4
     29   %tmp5 = call noalias i8* @_Znwm(i64 24) nounwind ; <i8*> [#uses=2]
     30   %tmp6 = getelementptr inbounds i8, i8* %tmp5, i64 16 ; <i8*> [#uses=2]
     31   %tmp7 = icmp eq i8* %tmp6, null                 ; <i1> [#uses=1]
     32   br i1 %tmp7, label %bb10, label %bb8
     33 
     34 bb8:                                              ; preds = %bb
     35   %tmp9 = bitcast i8* %tmp6 to i32*               ; <i32*> [#uses=1]
     36   store i32 1, i32* %tmp9
     37   br label %bb10
     38 
     39 bb10:                                             ; preds = %bb8, %bb
     40   %tmp11 = bitcast i8* %tmp5 to %0*               ; <%0*> [#uses=1]
     41   call void @_ZNSt15_List_node_base4hookEPS_(%0* %tmp11, %0* %tmp) nounwind
     42   %tmp12 = load %0*, %0** %tmp3                        ; <%0*> [#uses=3]
     43   %tmp13 = icmp eq %0* %tmp12, %tmp               ; <i1> [#uses=1]
     44   br i1 %tmp13, label %bb14, label %bb16
     45 
     46 bb14:                                             ; preds = %bb10
     47   %tmp15 = call i32 @puts(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @1, i64 0, i64 0))
     48   br label %bb35
     49 
     50 bb16:                                             ; preds = %bb16, %bb10
     51   %tmp17 = phi i64 [ %tmp22, %bb16 ], [ 0, %bb10 ] ; <i64> [#uses=1]
     52   %tmp18 = phi %0* [ %tmp20, %bb16 ], [ %tmp12, %bb10 ] ; <%0*> [#uses=1]
     53   %tmp19 = getelementptr inbounds %0, %0* %tmp18, i64 0, i32 0 ; <%0**> [#uses=1]
     54   %tmp20 = load %0*, %0** %tmp19                       ; <%0*> [#uses=2]
     55   %tmp21 = icmp eq %0* %tmp20, %tmp               ; <i1> [#uses=1]
     56   %tmp22 = add i64 %tmp17, 1                      ; <i64> [#uses=2]
     57   br i1 %tmp21, label %bb23, label %bb16
     58 
     59 bb23:                                             ; preds = %bb16
     60   %tmp24 = udiv i64 100, %tmp22                   ; <i64> [#uses=1]
     61   br label %bb25
     62 
     63 bb25:                                             ; preds = %bb25, %bb23
     64   %tmp26 = phi i64 [ %tmp31, %bb25 ], [ 0, %bb23 ] ; <i64> [#uses=1]
     65   %tmp27 = phi %0* [ %tmp29, %bb25 ], [ %tmp12, %bb23 ] ; <%0*> [#uses=1]
     66   %tmp28 = getelementptr inbounds %0, %0* %tmp27, i64 0, i32 0 ; <%0**> [#uses=1]
     67   %tmp29 = load %0*, %0** %tmp28                       ; <%0*> [#uses=2]
     68   %tmp30 = icmp eq %0* %tmp29, %tmp               ; <i1> [#uses=1]
     69   %tmp31 = add i64 %tmp26, 1                      ; <i64> [#uses=2]
     70   br i1 %tmp30, label %bb32, label %bb25
     71 
     72 bb32:                                             ; preds = %bb25
     73   %tmp33 = mul i64 %tmp31, %tmp24                 ; <i64> [#uses=1]
     74   %tmp34 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @0, i64 0, i64 0), i64 %tmp33) nounwind
     75   br label %bb35
     76 
     77 bb35:                                             ; preds = %bb32, %bb14
     78   %tmp36 = load %0*, %0** %tmp3                        ; <%0*> [#uses=2]
     79   %tmp37 = icmp eq %0* %tmp36, %tmp               ; <i1> [#uses=1]
     80   br i1 %tmp37, label %bb44, label %bb38
     81 
     82 bb38:                                             ; preds = %bb38, %bb35
     83   %tmp39 = phi %0* [ %tmp41, %bb38 ], [ %tmp36, %bb35 ] ; <%0*> [#uses=2]
     84   %tmp40 = getelementptr inbounds %0, %0* %tmp39, i64 0, i32 0 ; <%0**> [#uses=1]
     85   %tmp41 = load %0*, %0** %tmp40                       ; <%0*> [#uses=2]
     86   %tmp42 = bitcast %0* %tmp39 to i8*              ; <i8*> [#uses=1]
     87   call void @_ZdlPv(i8* %tmp42) nounwind
     88   %tmp43 = icmp eq %0* %tmp41, %tmp               ; <i1> [#uses=1]
     89   br i1 %tmp43, label %bb44, label %bb38
     90 
     91 bb44:                                             ; preds = %bb38, %bb35
     92   ret i32 0
     93 }
     94 
     95 declare i32 @printf(i8* nocapture, ...) nounwind
     96 
     97 declare void @_ZNSt15_List_node_base4hookEPS_(%0*, %0*)
     98 
     99 declare noalias i8* @_Znwm(i64)
    100 
    101 declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) nounwind
    102 
    103 declare void @_ZdlPv(i8*) nounwind
    104 
    105 declare i32 @puts(i8* nocapture) nounwind
    106